The home is located in Denmark Hill, South-East London (Photo: Foxtons) // Some of the most interesting homes we've covered were conceived due to constraints in size, budget, or location. That said, there's generally more to work with than 2.5 meters (8 ft, or 99 inches) in width, as was the case with what's thought to be London's narrowest house. It recently hit the market and is expected to fetch at least £450,000 (US$757,000).